https://www.cfasecurity.com/door-access-control 

Access control systems regulate entry to buildings, rooms, or digital resources, ensuring security and restricted access. These systems use keycards, biometric scanners, PIN codes, or mobile authentication to grant or deny entry. Businesses, hospitals, and data centers rely on them to protect sensitive areas from unauthorized access. Modern access control integrates with surveillance and alarm systems for enhanced security. Cloud-based solutions allow remote management and real-time monitoring. By implementing multi-factor authentication and role-based permissions, organizations reduce risks and enhance safety. Access control systems are essential for safeguarding assets, improving operational efficiency, and ensuring a secure environment.